Millstone-dress



A. D PA M 11 t RLING. i s one Dress.

" No. 232,603., Patented-Sept. 28, I880.

Ira/M2,;

NITED STATES PATENT OFFICEQ;

ALBERT I). FARLING, OF GRAND RAPIDS, MICHIGAN.

MJ LLSTONE-DRESS.

SPECIFICATION forming part of 'Letters Patent No. 232,603, dated September 28, 1880.

Application filed March 4, 1880.

To all whom it may concern: 7

Be it known that I, ALBERT D. FARLING,

of Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful lmprovementsin MillstoneDresses; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being made to the accompanying drawings, forming a part of this specification, and in which- Figure 1 is a face view of a burr-stone, showing my improved dress as applied? thereto; Fig. 2, side elevation of the same.

My invention relates to certain new and useful improvements in the class of millstonedress more especially designed for granulating middlings; and the invention consists in a novel arrangement of furrows, whereby an increasing draft is obtained from the eye to about 'twothirds of the distance toward the periphery or skirt of the stone, from which point to the periphery or skirt of the stone there is no draft except by the centrifugal force of the runner, thus permitting the principal grinding to take place at or near the skirt or periphery of the stones, where the velocity and grinding-surlaces are'the greatest, all as will be hereinafter fully described, and specifically pointed out in the claim.

In the drawings, Arepresents a millstone or burr; A, its central eye; B, the main furrows extending fromthe eye to the periphery or skirt of the stone, and O the quarter-furrows of an ordinary-dressed millstone.

D represents the main lands, and E the quarter-lands.

.00 represents angular cross-furrows, connectin g the main furrows, and also the quarter-furrows with themain furrows, in any desired number and arran ged at any desired angle, although preference is given to cross-furrows running at about the same angle as the quarter-furrows. These cross-furrows m commence to connect the main furrows at the eye of the stone, and extend over about two-thirds of the surface of the stone from the eye toward the periphery or skirt of the stone, thus leaving the balance of the land-surface to the periphery or skirt of the stone smooth.

The results obtained by the increased num- (ModeL) out clogging; third, the cross-furrows,continually passing each other in the directions secured by my dressing, grind withoutchopping, as do thosewith furrows terminatingat the eye; fourth, by this dress fragments of the main lands extend along the bosom of the stone to the very eye itself; fifth, these cross-furrows increase the draft toward the skirt from the eye, securing the greater draft nearest the eye,

'where the turning velocity is the slowest,

thereby forcing the material to be ground in exactly the right proportion toward the skirt, Where the velocity and grinding-surfaces are the greatest; sixth, the ability to increase or diminish at pleasure the draft and grindingsurface by increasing or diminishing, as may be required, the number of cross furrows; seventh, the effect in grinding middlings is of the greatest importance, they being of a glutinous nature, inclining to stick and clog near the eye of the stone, and the result is, when finally ground, there are two qualities of middlings, while my dress so distributes and grinds them that there are no second middlings, and the flour is left perfectly pure and white, as the hull is but slightly broken and is not pulverized by grinding; eighth, my improved dress can also be applied to any of the ordinarily-dressed millstones or burrs.

I am aware that cross-furrows connecting the main and also the quarter furrows with the main furrows, and extending from the eye to the periphery of the stone, are common; but in such arrangement there is an increasing draft from the eye to the periphery of the stone, and such I Wish to be understood as distinctly disclaiming as of my invention.

Havingthus fully described my invention, plain land-surface from said point to the pewhat I claim as new,rand desire to secure by riphery or skirt of the stone, as and for the 10 Letters Patent, ispurpose herein shown and described.

In a millstonc-dress the combination, with 5 main and quarter furrows B O, of connecting ALBERT FARLING cross-furrows on, extending from the eye to Witnesses: about two-thirds of the distance toward the EDWIN A. BURLINGAME, periphery or skirt of the stone and smooth or DENNIS L. ROGERS. 

